Abrading device.



J. B. GILBERT.

ABRADING DEVICE.

AIIIICAHON mu) JULY 17.19MB.

Patented Apr. 1,1919.

W l/E/V 70R @184 QWA Q1441 r FFItCE.

JOSEPH BROOKS GILBERT, OF BEVERLY, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

To all whom it may concern:

Be it known that I, JOSEPH Bnoons G11.- BER'T, a citizen of the United States, residing at Beverly, in the county of Essex and State'of Massachusetts, have invented certain Improvements in Abrading Devices. of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to abrading devices, and is herein shown as embodied in a device of this character particularly designed for use in the manufacture of boots and shoes. It will be understood, however, that in its broader aspects the invention is not limited in its applicability to devices particularly intended for shoe work.

In prior United States Letters Patent No. 1,054,656, granted on February 25, 1913 upon an application of R. F. McFeely there is shown and described a machine for use in trimming off the surplus projecting margin of the upper of a lasted shoe at the 'toe end of the shoe, the machine including a rapidly rotated cylindrical trimming tool. The trimming tool shown in said patent comprises a sheet metal strip provided with a large number of abrading projections and having its opposite ends bent to. form flanges, this abrading strip being curved about the periphery of a supporting wheel of skeleton construction to position its flanged ends in contiguous relation and held in place at the opposite ends of the wheel by means of detachable rings which are provided with annular flanges to overlie the marginal edges of the strip and are secured in position by fastening screws.

The sheet'metal abrading strips in tools of this character require frequent replacement because of wear, and in order to substitute a new strip it is necessary for the operator to remove one of the holding rings.

In replacing the ring to hold the new strip in position it sometimes happens, because of the ditliculty of retaining theresilient strip in the preciseeonformation required while slipping the ring into place, that by reason of failureof the operatorto exercise due care the ringmay not be fully advanced to its correct location when the fastening screws are applied to hold it, and a portion of the margin of the strip may thus be located out- Spccification of Letters Patent.

ermine DEVICE.

Patented Apr. 1, 1919.

Application filed July 17, 1918. Serial No. 245,316.

side of its proper position under the flange of the ring. danger to the operator, since the improperly secured strip is likely to be displaced and even broken by centrifugal force in the rapid rotation of the device and injure the operator.

An important object of this invention is to provide an improvement in abrading devices for the purpose of eliminating danger of injury to the operator, and to this end a feature of the invention resides in a novel construction whereby in the assembling of the parts of a rotatable abradinp, device the proper relation of the abrading, member to its holding means is insured. In the construction shown, comprising a holding ring shaped to overlie the marginal edge of a substantially cylindrical abrading strip, there is provided means for preventing the ring from turning until after it has been fully advanced to holding position, together with'securing means for the ring dependent for its application upon a turning movement of the ring from the position which it occupies during its movement into holding position. In the use of this construction it is impossible to secure the ring in place unless it is properly lo *atcd in its relation to the abrading' strip.

The novel features of the invention, in cluding certain details of construction and combinations of parts, will now be described with reference to the accompanying drawings and pointed out in the claims.

In the drawings, I

Figure 1 is a perspective view of an abradinp; device in which the invention is embodied, portions of the device being broken away to show the interior construction. and

Fig. 2 is a transverse section of a portion of the device shown in Fig. 1.

The device herein shown comprises a supporting wheel upon the periphery of which is mounted a sheet metal strip 2 bent in substantially cylindrical form and provided with a large niunber of abrading projections 4 upon its periphery, the opposite ends of the strip being inturned to provide flange 6 which lie in substantially contiguous relation when the strip is inplace. The supporting' wheel comprises a hub portion 8 adapted to be mounted upon a rotatable shaft, and projecting webs 10 upon which -This condition involves great V are assembled the abrading strip 2 encircles the annular members 12 and 14: upon which it is supported.

Each of the annular supporting members 1 1* is recessed on its outer sideto receive a holding ring 16 and to provide a lateral surface 18 against which the ring abuts when in holding position, each of the rings 16 be ing'provided with an inwardl extending annular flange '20 to overlie that portion of the marginal edge of the abradingstrip 2 which is supported upon the periphery of the member 14. For the purpose of securing each ring 16 in place a plurality of screws 22 are provided which project through holes 24 in the ring and are threaded into registering holes 26 in the supporting member 14:.

For the purposes of this invention the rotatable support carries at 'each end projecting members herein shown by Way of example as screws 28 threaded in the support and provided with heads 30 arranged to overlap portions of the ring 16, the heads 30 being spaced from the abutting surfaces 18 a distance substantially equal to the width or thickness of the abutting portion of the ring. In order to permit the ring to be slipped into place, the ring is provided with recesses 32 to receive the overlapping portions of the heads 30, the Walls of these recesses conforming substantially to the con tour of the heads. The construction thus permits the ring to be slipped into place to. carry its flange 20 over the margin of the strip 2 when the ring occupies a definite position with respect to rotation about the axis of the support, the heads 30 effectively preventing any turning movement of the ring until after it has been advanced fully into abutting relation to the surface 18, at which time'the flange 20 will overlie all portionsof the margin of the abrading strip. In order to insure that the ring shall thus be advanced fully into place before the securing screws 22 can be applied, the holes 26 in the annular member 1 1 are so disposed relatively to the cooperating holes 2% in the ring that the latter can register Withthem only after the ring has been turned a substantial distance -from the position which it occupies during its movement over the heads 30 to holding position. Insurance is thus afforded that in assembling the parts of the device all portions of the margin of the abrading strip shall be properly positioned under the flanges 20 of both the rings when the ring last tobe applied is secured in place by its screws, since if any portion of the abrading strip should be disposed against the inner edge of either of the flanges 20, it would be impossible to force the ring inward far enough over the heads'30 to permit it to be turned in such manner as to bring the holes 24 into position to register with the holes 26.

In the construction shown the locking and releasing means for each ring comprises overlapping screw heads 30 and cooperating recesses 32 substantially at opposite sides of the axis of the holder, thus afiording particularly effective insurance against an improper relation between the'abrading strip and the overlying flanges of the rings. It will be understood that the construction of the rings 16 and associated parts at one side of the device is substantially identical with the construction at the other side of the device, and that either ring may be removed to permit replacement of the abrading strip with equal insurance against improperly assembling the parts when the substitute strip is" applied. It will also be understood that the invention in its broader aspects is not limited with respect to the specific character of the locking and releasing means whereby the application and turning of the rings is controlled nor with respect to the character of the means for securing the rings in place.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In adevice of the class described, the combination witha rotatable support and an abrading strip encircling said support, of a holding ring having a flange to encircle the marginal. edge of said strip, the support having a lateral surface against which the ring abuts when in holding position, a member on the support constructed and arranged to overlap a portion of the outer lateral surface of the ring and spaced from said lateral surface of the support a distance substantially equal to the width of the abutting portion of the ring, the ring having a recess arranged to register with said member in one position of the ring to permit the ring to be moved axially of the support into or out of holding position, cooperating screw holes formed respectively in the ring and the support and arranged to registeronly when the ring has been turned to displace said recess from said member, and screws constructed to be applied in said holes to secure the ring in place.

2. In awdevice of the class described, the combination with a rotatable support and an abrad-ing strip encircling said support, of a holding ring constructed to overlie the marginal edge of said strip, a member on the support constructed and arranged to overlap a portion of the outer lateral surface of the ring when the ring is in holding position, the ring having a recess arranged to register llt with said member in one position of the ring to permit the ring to be moved into or out of holding position, cooperating holes formed res ectively in the ring and in the support an arranged to register only when the ring-has been turned to displace said recess from said member, and means constructed to be applied in said holes to secure the ring in place.

3. In a device of the class described, the combination with a rotatable, support and an abrading strip encircling said support, of a holding ring constructed to overlie the marginal edge of said strip, said ring being movable axially of the support into and out of holding position, means for preventing said ring from turning relatively to the support except When fully advanced to holding position, and means for securing the ring to the support only after the ring has been turned from the position which it occupies as it is moved into holding position.

t. In a device of the class described, the combination with a rotatable support and an abrading strip encircling said support, of a holding ring constructed to overlie the marginal edge of said strip, locking and releasing means constructed to permit application or removal of the ring only when the ring occupies a definite position with respect to turning movement about the axis of said support-and to permit the ring to be turned only when fully advanced to-holding position, and means for securing the ring in place only after the ring has been turned from the position which it occupies when applied. V 1

'5. In a device of the class described, the combination with a rotatable suppoit, of an abrading strip encircling said support, a detachable ring for holding said strip in position, locking and releasing devices substantially at opposite sides of the axis of said support and each operative independently of the other to prevent the ring from turning except when fully advanced to holding posi tion, and means constructed to secure the ring in place only after the ring has been turned from the position which it occupies as it is moved into holding, position.

6. In a device of the class described, the combination with a rotatable support and an abrading strip encircling said support,

of a member for holding said strip in place,

said member being movable axially of the support into or out of holding position, means for securing the member to the support, and locking and releasing means constructed to permit the application of said securing means only after the member has been fully advanced to holding position and then turned.

7. In a device of the class described, the combination with a substantially cylindrical a'brading strip and a rotatable support for said strip, of a holding member having a portion constructed to encircle substantially the marginal edge of said strip, locking and releasing means constructed to permit said member to be moved axially of the support into or out of holding position and to prevent said member from turning until after it has been fully advanced to holding position, and means constructed to secure the member in place only after it has been turned from the position which it occupies as it is moved into holding position.

8. In a device of the class described, the combination with a substantially cylindrical abrading strip and a rotatable support for said strip, of a member movable axially of said support into position to hold said strip in place, locking and releasing means constructed to permit the axial movement of said member in one position of the member and to prevent the member from turning until after it has been fully advanced to holding position, and means constructed to secure said member in place only after it has been turned from the position which it 00- cupies as it is moved to holding position.

9. In a device of the class described, the combination with a substantially cylindrical abrading strip and a rotatable support for said strip, of a member movable axially of said support into position to hold the strip in place, means for Preventing said member from turning relatively to the support until after it has been fully advanced to holding position, and securing means for said member dependent for its application upon a previous turning movement of th member from the position which it occupies during its movement into holding position.

10. In a device of the class described, the con'ibination with a rotatable support and an a-brading strip encircling said support, of a member having a substantially annular flange to overlie the marginal edge of said strip, means for detachably securing said member in operative position, and means constructed to prevent the application of said securing means if any portion of the marginal edge of the strip is improperly positioned relatively to the flange of said member.

In testimony whereof I have signed my name to this specification.

JOSEPH BROOKS GILBERT. 

